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Salem police said the Dunkin' Donuts on Lowell Road was robbed just after 8 p.m. Surveillance video shows the man pulling on his mask as he tries to talk, and the manager said the robber told the clerk to hurry up.

"We are looking to see if he walked into other stores in the area, see if he was going to plan on robbing one of those and didn't for some reason, and obviously went into Dunkin' Donuts and completed the act there," said Deputy Chief Shawn Patten.

Police got a vehicle description of a dark green Toyota, and investigators are looking at surveillance video of other businesses.

"We're hoping we can get any video of him, the suspect without a mask, or if there was anyone else in the vehicle, if we can get a plate -- so detectives are following up on numerous leads," Patten said.

Police said the robber was white and appeared to be wearing a black Adidas sweatshirt, black shoes and gloves. The car he got into had no rear license plate, police said.